1 & 2 A machinist needs to remove a tight fitting pin of material A from a hole

Question

1 & 2 A machinist needs to remove a tight fitting pin of material A from a hole in a block of material B. The machinist heats both materials to the same temperature and removes the pin easily. Which is true? Material B has a greater coefficient of expansion than Material A. Material B has the same coefficient of expansion as Material A. Material B has a smaller coefficient of expansion than Material A. Cannot determine the relationship between the coefficients of thermal expansion of the t. materials. The situation is not possible, heating block B will shrink the hole in the material because the material expands with increasing temperature. A 0.2-kg piece of ice at -15 degree C must be combined with how much water at 40 degree C to result in a mixture with a final temperature of 10 degree C?

Explanation / Answer

We know that the heat expands the total material effected by the heat , therefor the hole will also increase in size .

Material B has a greater coefficient of expansion than material A.

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